Our "instant index" here on saturday night, what's trending this weekend. Tonight in colorado a fight by some to become two states? 8 northern counties considering creating the 51st state, north colorado. Many residents present what they feel is a more liberal slant this their legislature now with stricter gun laws and gas drilling. Also trending new evidence from 35 million miles away that mars once had drinkable water. Ten years after the launch nasa's opportunity rover analyzed what maybe the oldest rock captured and found that mars once had nonacidic water that could easily sustain life on earth. To what we thought looked alien. A preview of earth in the future. Nickolay lamm drew this progression seen in forbes. Will evolve in the next 1,000 years. Giving us bigger foreheads, largest eyes to see in dimmer lights as we colonize planets farther from the sun and more skin pigment to protect us from radiation in the earth's atmosphere.

This transcript has been automatically generated and may not be 100% accurate.

{"id":19357412,"title":"Fight to Make Colorado Two States","duration":"1:08","description":"Eight northern counties are considering seceding to create the 51st state, \"North Colorado\"","section":"WNT","mediaType":"Default"}